Table 2. Hydrogen-bond geometry (Å, °).

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O2—H22⋯O13i	0.79 (4)	1.90 (4)	2.680 (2)	169 (4)
O2—H12⋯O12ii	0.72 (4)	1.91 (4)	2.627 (2)	175 (4)
O3—H23⋯O11iii	0.73 (3)	1.91 (3)	2.629 (3)	168 (3)
O3—H13⋯O10iv	0.91 (3)	1.71 (3)	2.615 (2)	172 (3)
N2—H2N⋯O13v	0.79 (3)	2.10 (3)	2.887 (2)	174 (3)
N3—H3N⋯O12v	0.87 (3)	2.04 (3)	2.899 (3)	172 (2)
N2—H1N⋯O10iv	0.82 (3)	2.14 (3)	2.918 (3)	160 (2)
N3—H4N⋯O11vi	0.82 (3)	2.17 (3)	2.956 (3)	160 (3)

Symmetry codes: (i) ; (ii) ; (iii) ; (iv) ; (v) ; (vi) .